module _4for1MUX(
    input logic [31:0] case0,case1,case2,case3,
    input logic [1:0] OPctr,
    output logic [31:0] Result
    );
    always_comb
        case(OPctr)
            2'b00:Result=case0;
            2'b01:Result=case1;
            2'b10:Result=case2;
            2'b11:Result=case3;
        endcase
endmodule
